Screw refrigeration compressor unit start-up troubleshooting

Speaking of the startup failure of screw refrigeration compressor unit, there are fewer cases of failure to start because of compressor failure, unless it is a compressor quality problem, or like the rotor into the foreign body, the gap between the rotor is stuck, so that it can not turn; Compressor running time is relatively long, no regular large maintenance screw shift; Or the oil quality of the rotor is reduced, oil coking phenomenon, resulting in a large number of coke between the screw, and eventually lead to screw stuck. And the screw compressor unit can not start more reasons, in this article Xiaobian to share with you.

1, the unit pressure is high.

2. The power supply is faulty.

3. Excessive oil or liquid storage in the body.

4. The pressure relay alarm is not reset.

5, low oil pressure, can not establish normal oil pressure.

6. The unit is in the alarm state and has not been reset.

7, zero load switch damaged or zero load CAM loose (automatic unit). Even when the compressor is at zero load, there is no zero load signal input. After starting the compressor is always in the unloading state, which will eventually cause the alarm that the slide valve does not move and the compressor cannot start.

8, motor winding burnt or short circuit, check the electrode can be.

9. The coaxiality of compressor and motor is out of alignment, re-correct the coaxiality.

10. The contactor, intermediate relay and other electrical components in the control cabinet are faulty.

11, the circuit connection between the control cabinet and the console is wrong, check the circuit.

12, compressor wear burn.